mid-ocean ridge-undersea mountain chain where new ocean floor is produced Sonar-system that determines the distance of an object under water by recording echoes of soundwaves Sea-Floor Spreading-process in which molten material adds new oceanic crust to the ocean floor deep-ocean trenchesdeep ocean valley along the ocean floor through which ocean crust slowly sinks into the Mantle Subduction-oceanic crust sinks beneath the deep-ocean trench and back into the mantle at a convergent boundary
Outline
Mapping the mid-ocean ridge
mid-ocean ridge is the longest chain of mountains in the world
sonar is a device that bounces sound waves off under water objects and then records the echoes of these sound waves
Table of Contents
Sea Floor Spreading
Vocabulary
mid-ocean ridge-undersea mountain chain where new ocean floor is produced
Sonar-system that determines the distance of an object under water by recording echoes of soundwaves
Sea-Floor Spreading-process in which molten material adds new oceanic crust to the ocean floor
deep-ocean trenchesdeep ocean valley along the ocean floor through which ocean crust slowly sinks into the Mantle
Subduction-oceanic crust sinks beneath the deep-ocean trench and back into the mantle at a convergent boundary
Outline
Mapping the mid-ocean ridge
- mid-ocean ridge is the longest chain of mountains in the world
- sonar is a device that bounces sound waves off under water objects and then records the echoes of these sound waves
Evidence for Sea-Floor spreadingSubduction at deep-ocean trenches
Subduction and Earth's Oceans